91549694519 has 4 divisors (see below), whose sum is σ = 92456127240. Its totient is φ = 90643261800.

The previous prime is 91549694503. The next prime is 91549694549.

91549694519 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91549694519 - 2⁴ = 91549694503 is a prime.

It is a super-2 number, since 2×91549694519² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91549694549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453216209 + ... + 453216410.

It is an arithmetic number, because the mean of its divisors is an integer number (23114031810).

Almost surely, 2^91549694519 is an apocalyptic number.

91549694519 is a deficient number, since it is larger than the sum of its proper divisors (906432721).

91549694519 is a wasteful number, since it uses less digits than its factorization.

91549694519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906432720.

The product of its digits is 15746400, while the sum is 62.

The spelling of 91549694519 in words is "ninety-one billion, five hundred forty-nine million, six hundred ninety-four thousand, five hundred nineteen".